Dear All, Having been management for many years I'm not sure how to take that comment. However let me jump into the fray a bit. I think we discussed this issue some months
ago as part of a different topic. When I was at Certelecom we settled for a number of years on using DEC PC platforms for test beds. We found them to be well made and well shielded. As someone already commented you need to assume that their useful life as a test platform with good EMI/EMC characteristics is limited to at the best 6 months. This is due to changes in technologies, use and abuse of the test bed and in particular for EMC degradation from EMC testing. Now that DEC is no longer the choice of other makes as test beds is a bit of a problem. A few customers supplied some Compaq Presarios as their test beds of choice and I remember having EMI problems with them. Another issue to consider is ease of use as a test bed. Some PC's have insufficient slots or just clumsy ways of getting into them to install cards. I would suggest that the main brands are good choices. One writer suggested that you contact the EMC department of the manufacturer for a courtesy compliance check. Depending on the size of the manufacturer and the size of the requester customer this this is possible but not always likely for most companies. We stipulated a right of return to our supplier if our EMI/EMC audit showed anything significant at 6db or less. I don't recall ever having to return a PC but I do remember a monitor that was replaced. It certainly would pay to contact the EMC department of the manufacturers to see what they might suggest. The Plug and Play aspect I don't buy into. I've seen some cases where combinations of compliant components create screaming EMI problems in combination/assembled product. Plug and Play to me says basically that each component manufacturer should have done his due diligence on his product and you would hope that the end assembler has done his too. However this is not always the case. When I start seeing or using or hearing the words I think, I assume, I thought or I believed my alarm bells go off. There is some fact that is missing or has been set aside for some assumptions. Caveat Emptor. Regards G. Rae Dulmage, B. Comm., President TelApprove Services Corporation (613) 257 3015. [email protected] wrote: > Derek, > > I'm sure that Mr. Grasso meant that in jest. Anyway, IMHO, if any EMC > engineer > put their faith in the plug-n-play scenario, he or she would be candidates > for > management. :-) > > Best regards, > Ron Pickard > [email protected] > > ______________________________ Reply Separator > _________________________________ > Subject: Re: Seeking PCs that Pass CISPR > Author: <[email protected]> at INTERNET > Date: 3/5/99 12:16 PM > > In a message dated 3/5/99 11:01:58 AM Central Standard Time, > [email protected] writes: > > << I am confused. What's the problem? > If we (the EMC Community) have faith in > Plug & Play (as the new FCC process is dubbed) then you > should be able to buy ANY FCC logoed PC and pass. > >> > > I can't imagine ANY EMC engineer having faith in a plug and play approach! > > Derek. > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
